Samsung galaxy s2 from janpara

Hi few days ago I bought a fantastic Samsung s2 from janpara store in akiabara...the terminal was an English model( for Europe market wich is we're I live) I've tested the phone with my Italian sim card and was working perfectly and that it was since yesterday..At the moment im outside Tokyo metropolitan area for a couple of days of Japanese onsen and I realized that my mobile cannot connect to the mobile network!! In the beginning I thought something about the location but then I changed the sim card with a friend docomo ones...same results..so I've been resetting to factory initial state the terminal with some hope..but did not work...now what to say?? Someone can tell about??do I have to bring the mobile back to janpara store??i have a month of warranty...but I like the phone!!please gime me some help!!thanks paolo

Replies to This Discussion

Permalink Reply by Kizuki on October 28, 2011 at 1:12pm

Pao,

I am assuming that you got the International version (European?) of the S2.

Docomo operates on ~800 MHz and 2100 MHz. Most of the international phones have support for 2100 MHz, but hardly any of them have support for 800 MHz. It is highly likely that your S2 being the international S2, also has the international radio (without the 800 MHz) support.

Now in Metropolitan areas, 2100 MHz is available, so probably your phone could connect easily. But in FOMA areas (typically countryside), the only signal available is for 800 MHz. In this case, since your phone does not support, it cannot connect.

Permalink Reply by pao on October 28, 2011 at 10:03pm

Hi kizuki,i Belive you kind of right...in fact once out from the location of takaragawa the telephone started to work again!! That fact Was totally unaspected ..so certanely,as u said,is something to do with the network,but still is a mistery..I've checked the operative frequency of my old iPhone and are 850,1900,1200MHz and the Samsung ones are 850,900,1900,2100....strange don't u think??

Permalink Reply by Kizuki on October 28, 2011 at 10:11pm

It depends whether 850Mhz support is for GSM or WCDMA. Also, there is other technical stuff like channels etc and the fact that the Docomo FOMA is nearer to 800Mhz.

To summarize, most multi-band phones support 850 or 900 Mhz GSM.

However, WCDMA 800-850 Mhz is required for Docomo FOMA. iPhone is one of the very few international phones which supports this.

Permalink Reply by pao on November 2, 2011 at 10:21pm

Hi kizuki sorry for late unswering u totally right !!im back to Italy at the moment and I can confirm that the mobile in question is fully working so your explanation was correct 100% ,thanks for advising and for competence u have in mobile networks ..paolo